Featuring long life and maintenance free advantages, silicon nitride ceramic is used as main materials of protection tubes for thermocouple.

● There is no eluted contamination into molten aluminum. Therefore, the purity of the metal is maintained.

● Superb thermal shock resistance.

● Light weight, high strength, and easy to handle.

● Even with flux, silicon nitride is hardly eroded. This ensures long life.

 

 

 

Size(mm):  OD28 * ID16 * L400-1200

 

​The thermocouple is the most widely used temperature measurement sensor, and the long-term stability, service life and other performance indicators of the thermocouple are closely related to the protection tube. 

The silicon nitride ceramic protection tube is used in conjunction with the thermocouple to protect the thermocouple, so that the thermocouple can work normally in a special environment, and can resist high pressure and high flow rate. 

To Process:

1. Cold isostatic pressing forming

2. Mechanical processing

3. Air pressure sintering

 

Index:

Density>3.2g/cm3

Silicon nitride content>92%

Flexural strength>600Mpa

Compressive strength>1500Mpa

Thermal conductivity (W/mk): 16-22

Porosity 0

Coefficient of thermal expansion (RT-1000℃): 3.2

Hardness (HRA)>92

 

Features:

1. Good compactness and high strength. To

2. Excellent thermal conductivity and thermal shock resistance.

3. It is non-wetting and corrosion-resistant with non-ferrous metal melts such as aluminum melt. To

4. High temperature resistance and low thermal expansion coefficient.